JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2013, Vol. 43 ›› Issue (5): 55-67.

• Articles • Previous Articles     Next Articles

Practical tracking by output feedback for a class of nonlinearly
parameterized systems with unknown control coefficients

WANG Fei-fei1,   YAN Xue-hua2*, LIU Yun-gang3   

  1. 1. Institute of Electric Control Technology, WeiChai Power, Weifang 261205, China;
    2. School of Electrical Engineering, University of Jinan, Jinan 250022, China;
    3. School of Control Science and Engineering, Shandong University, Jinan 250061, China
  • Received:2013-03-16 Online:2013-10-20 Published:2013-03-16

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Abstract:

The practical tracking control by output feedback was considered for a class of nonlinearly parameterized systems with unknown control coefficients. By introducing the appropriate coordinate transformation, the original system was transformed into a new system without uncertain control coefficients. Then, a suitable highgain observer was constructed and the tracking controller by output feedback was successfully designed using the backstepping technique. The simulation result showed that if the design parameters were chosen suitably, the designed controller guaranteed  the closed-loop system states to be globally bounded, and the tracking error to converge to the prescribed small neighborhood of the origin after enough long time.

Key words: nonlinear systems, practical tracking, unknown control coefficients, high-gain observer, output feedback

CLC Number: 

  • TP273
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